Sash trimming machine



March 1, 1932. c. F, PAUL sAsH TRIMMING MACHINE F lled Ont. l0, 1950 2Sheets-Sheet 1 FIGA i was FIG.

3nnentor CHHRLES F. PHI/L (Ittorneg March 1, 1932. c. F. PAUL SASHTRIMMING MACHINE 2 Sheets-Sheet 2 Filed Oct. 10, 1.930

FIGZ

I Zhwentor CHARLES F PHI/L (Mom 35 Patented Mar. 1, 1932 PATENT OFFICECHARLES PAUL, OF ST. LOUIS, MISSOURI sAsH TRIMMING MACHINE Applioationfiled flctober 10, 1930. semi No. 487,791.

This invention relatesto improvements in sash trimming machines, andmore particularly to that class of machines employed for trimming orcutting off the ends of pieces of sash or equivalent millwork, atvarious angles, to cause the resultant end faces to conform to andmatch, for example, a preformed Ornamental face or end of a given'lengthof material. v

An object of the present invention is to pro vide an improved sashtrimming machine employing a rotary cutter element which is pre shapedto conform to the quirks of the material to be processed. e h

A further object is to provide an improved coper or sash trimmingmachine including a rotary cutter element which in operation'is ledacross the end portion of the piece to be cut.

50 A still further object is to provide an improved coper which issimple and easily opera-ted, and which producesa finished product withend copes on the sticking, which corre spond to the quirked face of thesticking, and which accomplishes this cutting without any dangerofsplitting or breaking the piece, or destroying any of the end fibersofthe wood'as is sometimes the case with the older prevailing types ofsash trimming machines in which so a knife is forced downwardly throughthe end fibers of the wood and therefore is very apt to fracture andpossibly displace, undesirably, the weaker fibers of the sticking.

Further objects and advantages will appear from the following detaileddescription of parts and the accompanying drawings, in which: v

Fig. 1 is a front elevation of a preferred form of wood coper to whichthe present improvements are applied; Fig. 2 is a side elevation,partially insection, of the improved deviceyFig, 3 is a plan view of apreferred form of cutter element; F ig. 41 is a sectional elevationtaken along the line 4 4= in Fig. 3; Fig. 5'is a fragmentary plan viewofa portion of the device as viewed-from line 5-5 in Fig. 2; and Fig. 6is a sectional elevation taken along the line 6-6 in Fig. 5. It will, ofcourse, be understood that the present detailed description of parts andthe tion.

Referring by numerals to the drawings, 10 represents a support orstandard for the operative elements of the machine hereinafterdescribed. A plate 11 is preferably detachably secured tothe standard10, and is, by preference, provided with a plurality of arc.- uate slots12 through which extend clamping bolts 13 for independently adjustablypositioning tables 14. It will be readily seen that the tables letextend radially inwardly along the face of the plate 11, and that theirinner ends 15 are pivotally positioned to the vertical plate 11, thepivots being substantially spaced from each other for a purposehereinafter appearing. Each table may be independently adjusted andclamped to the plate 1,1;atany desired angular inclination in respect tothe horizontal, for a purpose hereinafter'appearing. Bed plates 16 areadjustably andlremovably Secured to the tables 14 by means of bolts 38.These plates are, by preference, formed of a hard wood, and are providedwith grooved or quirked portions 18 to correspond to the quirked moldingof the particular sticking to be processed, in order to insure a rigidand level foundation or base for the sticking to be placed thereuponduring the cutting operation, as will hereinafter appear. The bed plates16 are made interchangeableso that a bed plate may be provided toconform to the quirked portion of any desired sticking which may beplaced on either of the table s.

A vertically movable head 17 is provided, which is guided to provide astraight line sliding movement, by means of suitable channeled orguidesurfaces (not shown). formed on the plate 11. A control treadle or foot.le- Year 19 is pivotally attached to the lower portion of the support10, by means of a pin 20. Intermediate the ends of the lever 19, isprovided a pivoted connecting link 21, the other end of which ispivotally secured to-the movportion ofthe lever 19. It will be readilyin any desired manner.

seen that the spring will return the head 1'? and lever 19 to an upper,normally inoperative position, after releasing the treadle oi manual orfoot pressure.

A power unit such as an electric motor 23 is, "y preference, attached tothe head portion lTas by suspension from abracket or support and henceis movable with the head portion under influence of thelever 19. Themotor is, by preference, of a high speed, reversible type for reasonshereinafter appearing, and includes an extended rotor shaft 24: uponwhich is removably secured a rotary cutter element 25. This cutter maybe formed For instance, as shown in the preferred arrangement in Fig. 3,it may be provided with four cutter blades 26, but itwill be understoodthat a cutter having any other number of blades, may be used. Each bladeis, by preference, formed with opposedcuttina' edges 27, each of whichisipreshaped to conform to the quirks desired to be cut in the end ofthe sticking. By preference, the blades are each provided with a fiatportion 28 in order to insure sufiicient clearance between the cutterand the piece to be-cut, as the motor and cutter are brought downwardlyby manipulation of the treadle 19. i a

It will be readily seen that the bed plates extend inwardly, one fromeach side of the machine, and that a piece of sash or sticking, placedin, say the right hand bed plate as viewed in Fig. 1, extends inwardlyinto the path of the cutter suificiently to permit the end of thesticking to be out. An adjustable stop 29 provided on the bed plate,determines the proper distance placement of the sticking along the bedplate. The use of a stop or equivalent limiting projection such as 29,finds apurpose in cases where the rotary cutter is employedto form onlya portion of the endface of the sticking, there being a remaining. planeend face portion which may have been precut by sawing according to anyusual 5 method. In such a case the desired space relations betweenv sucha plane end surface,

and the quirks of the remaining end surface, are preserved so that aprocessed portion, or portions, will engage snugly and uniformly, themating surfaces.

A starting switch 30 for the motor may be secured to the plate 11, andis provided with a switch lever 31 which by preference is biased by aspring (not shown), to switchclosing position. A projecting member 32 isprovided on the movable head 17, and when the head is in its uppermostposition, this member holds the switch lever in its opencircuitposition. Vhen, however, the head is moved downwardly, due to pressureon the treadle 19, the member 32 moves away from the switch lever, whichthus closes the motor circuit, and the motor isstarted. Again on itsupward movement, after pressure is released on the treadle, theprojecting member positively engages the lever 31, to open the switchand stop the motor.

As above noted, the motor 23 is, by preference, of a reversible type. Bythis provision the stickings to be processed, may be placed in eitherbed plate from either side. For example, when the'material is extendedfrom the right side of the device, as viewed in Fig. 1,'the motor willrotate clockwise; but when cutting a sticking introduced from the lefthand side of the machine and disposed on the corresponding. bed plate,the motor may be reversed and rotated in a counterclockwise direction.By this provision, the rotating knife in its downwardtravel will alwaystend to force the sticking into closer contact with the bed plate and tomaintain it in close engagement with the stop 29.. p

The presently preferred electrically 0p.- erated coper is simple andentirelyautomatic in its operation, except for the operators controlmovement of the treadle to lead the rotary cutter across the end grainof the wood. The finished product is clean cut and free of any chippingoff of the under grain of the wood. Also, in older prevailingtypes ofmachines, in which a chopping action takes place, as distinguished froma rotary cutting action, there is 'a tendency for the lower fibers ofthe wood to break or chip off, which often is so destructive as torender the piece of wood I useless for its intended purpose. Sincesticking for sash purposes, molding and various uses as trim, isgenerally cut to exact length, destruction of one end portion destroysthe usefulnessof the entire piece. If only one end of the sticking hasbeen unsuccessfully processed by the older methods, as often occurs, oneor more repeat operations are necessary, resulting in an obvious wasteof time and material. With the present improved device, there is notendency for, cracking, breaking, fracturing or splintering off tooccur, and hence quantity of production and quality of the finishedproduct are greatly enhanced. j

A distinct advantage of the coping device presently described, is foundin the facilities aiforded for processing comparatively large pieces ofmaterial. For example, no difficulty is experienced in forming materialconsiderably, greater than two: inches in thickness, whereas with theolder types ofdevice available for this purpose,it is racticallyimpossible to process sticking o a thickness in excess of one andone-half 01 two inches. Even where work of this order is attempted withthe older devices, a great percentage of material is rejected by reasonof breakage an splitting, as above described.

For the sake of providing a complete description, a device has beendescribed as constructed according to present preference, and designedfor use in connection with sash sticking. It will, however, be obviousthat the device may be employed with or without detailed structuralmodification, to handle coping work in connection with molding and otherwood trim of any of the usual varieties.

It will appear that the machine of the present description is semiportable, light, compact, and consists of a minimum number of workingparts, as well as being of rugged construction and requiring no highdegree of skill for its successful operation, in fulfillment of theseveral objects set forth above.

I claim as my invention:

1. In a sash coper, a motor including a rotor shaft, a cutter elementconnected to said shaft, and provided with radially and axially spacedcutting faces, a plate element adapted to form a bed for sash to beoperated upon, means for moving one of said elements transverse to theother to cut the sash, and means for selectively tilting said plateelement, while maintaining it in substantial parallelism with the cutteraxis.

2. In a sash trimming machine, the combination of a bed plate, anelectric motor including a rotor shaft, a cutter rotated by said shaft,and provided with axially spaced, stepped cutting faces, said bed platebeing adapted to position a piece of sash endwise to said cutter, andmeans for. leading said rotary cutter across the end of said sash.

3. In an electrically operated coper, the combination of an electricmotor having a rotating shaft, a cutter having a quirked facecorresponding substantially to the beading to be operated upon, a bedplate for holding the beading, said cutter being rotated by said motorshaft. and means for moving said outter past said bed plate to cut saidbeading.

eLIn a coping machine, a power unit, a rotary cutting element associatedtherewith, a support for material in the machine, tiltable about an axisparallel to that of the cutting element, and combined control means formoving said cutting element into working position, and for controllingthe energization of said power imit.

5. In a coping machine, an electric motor, a rotary cutter havingportions of stepped cutting diameters, and carried by the motor, asupport for material in the machine, movable, for adjustment, about anaxis parallel to that of said cutter, a control element arranged formoving the motor and support relative to each other and aswitch for themotor, arranged for actuation by said control element.

6. In a device for producing a finished ornamental end face on woodsticking or the like, a rotary cutter, a power unit associatedtherewith, means for leading said cutter across the endof the sticking,said cutter having edge portions, adapted to form, simultaneously, aplurality of end quirks on the sticking, corresponding substantially tothe quirks on a lateral face of such sticking.

7. In a coping machine, an angularly 'adjust-able bed plate forsticking, a motor, and a rotary cutter having a plurality of laterallyand radially spaced cutting edges, and in driven relation to said motor.

8. In a coping machine, a bed plate for sticking, a motor, a rotarycutter driven by the motor, and having a plurality of cutting edgesspaced along its axis of rotation, means for leading said rotary cutteracross the end of said sticking, and means for angularly adjusting thebed plate about an axis parallel to the axis of said cutter.

9. In a coping machine, a base including a hollow vertical standard; amounting plate carried by said standard and having a curved slot on eachside of the standard; a pair of supports adapted for independent angularadjustment with respect to said standard, the supports each beingpivoted near its inner end to said mounting plate, with the pivotstherefor in substantially spaced relation; means associated with saidcurved slots, for angularly adjusting said supports; an electric motor;a mounting therefor, slidably disposed with respect to the upper portionof said standard; a foot-operated control member pivoted near the lowerportion of said standard, an operating arm extending through a portionof said standard to the support for said motor, a spring having adjustable connection with fixed anchorage near the upper end of saidstandard, and connected at its lower end with said foot control member,and a rotary cutter carried-and arranged for operation by said motor,said outter having a series of cutting edges'spaced lengthwise of eachother along the cutter axis, a bed plate detachably carried by each ofsaid an ularly adjustable supports, and an end stop for sticking in themachine, associated with the inner end of each of said bed plates.

' CHARLES F. PAUL.

